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The paper describes the chemical depolymerization of the polyethylene terephthalate (PET) waste from postconsumer soft drink bottles and a search for the way to use this product. The depolymerized oligoester obtained from glycolysis of PET waste using tiethylene glycol was transesterified with castor oil which resulted in the formation of hydroxyl-functional polyester polyol, with hydroxyl value of...
Ring-opening polymerizations of d-lactide, l-lactide and ɛ-caprolactone initiated from hydroxy groups of castor oil (CO) produced three kinds of branched oligomers (CODLAO, COLLAO and COCLO). The reactions of CODLAO, COLLAO and COCLO with hexamethylene diisocyanate (HDI) produced polyester–urethane networks (PUCO-scLAO/CLOs 100/0, 75/25, 50/50, 25/75 and 0/100) with different feed ratios of stereocomplex...
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